Server-side Kermit - Investigate Ktor integration

[psh]

Look at their Logger interface, look at using SLF4J and also, don't forget the CallLogging plugin and if that can use an external logger.

the kermit-spring logger factory and property delegate may need to split out as they could be common between kermit-ktor-server and kermit-spring

    private val logger by kermitLogger()

Look at the Ktor output and see if the kermit-spring message formatter would be useful there too.